#include <cstdio>

struct ClockOfTheLongNow {
  void add_year() { year++; }
  int year;
};

int main(int argc, char **argv) {
  ClockOfTheLongNow clock;
  clock.year = 2021;
  clock.add_year();
  printf("The year is %d\n", clock.year);
  clock.add_year();
  printf("The year is %d\n", clock.year);
  return 0;
}
